[sdiy] OTA to voltage-control resonance?

[Ian Fritz]

At 06:55 AM 8/31/2009, Jerry Gray-Eskue wrote:
>... I was wondering if
>anyone would care to comment on the merits of the "Logarithmic Current
>Source" shown in figure 30 of the National LM13700 data sheet.
>
>I see that PAIA is using a variation of this circuit and claims that the use
>of the linearizing diode provides temperature compensation.

I don't know about anybody else, but I never had any luck getting that 
design to work very well.

   Ian